No Heat

Dryer Repair
,
1

I have a whirlpool gas dryer model # LGR4634EQ3, when i turn on , it s heat up only 5-7 mints, ANY ONE help me What is wrong? PLEASE
where is location of the part? :confused: :confused:
open from the front or back? :rolleyes: :rolleyes: :eek:

THANk YOU